    document.addEventListener('DOMContentLoaded', function () {
        //设置font-size
        var deviceWidth = document.documentElement.clientWidth;
        if(deviceWidth > 640) deviceWidth = 640;
        document.documentElement.style.fontSize = deviceWidth / 7.5 + 'px';
        //注册FastClick
        FastClick.attach(document.body);
    }, false);


